Internal grinder control



Aug. 16, 1932. c. T. RAULE 1,871,463

INTERNAL GRINDER CONTROL Filed March 1, 1929 2 Sheets-Sheet l Aug. 16,1932. c. T. RAULE 1,871,468

INTERNAL GRINDER CONTROL Filed March 1, 1929 2 Sheets-Sheet 2 ITNESS: vINVENTOR Patented Aug. 16, 1932 taxmanr. mmm, m lanooznmn, rnnnsiznvmml. mimngl. qmunki z nwnnnbn "f H ll plllpatibn. illg d 1,4929, set-MN,W391 z r I M lihventian mm; m minti ie r ifniiing W imflew qt' di unitflfl inga sifigle'r liififi of {like Lt able, wor'l't pieces? 'loadedit'itoithefuni llsfas fl'ley pass a. loading pbsi- Hon a'nd' gr'dunki'tosize before they reaph an unloadin position adjagent and. somewhat ""10bfiik t e i0afiing i osition, the invention havingfparticul'air reerencev to a safety de- :v'ice;

plirposdf i ihvenfiijoh is to Ship the rlial ymbvemnt ofpth'e tsihlgfiifa grinding is 'jmitf. yeachs a designated point 'of its orbit "withouthaving th Wheel withdrawn from the -work; Usually the designated oint isone a little before nnloqdin'gflpqsi ion. I inbuilt ;a. shifi; lever,adapted, stbp the turn- I I rifra'tedbf any grinding fini'tiraching thfefsignape point without "hipifin made a dfinninatiyg movemen tfchar-"'zit'eti ie of 'haiV-ihg bbnfp'leted -its grinding, the ngrmaldetepmmgtive' moyements at the a is goini; if the nor' malwithdrawarmovement '40 ionmaof m inven i Sela-mug form that .15spracticn nd;.-eflicien# in gp eraxion and which ggvell ifllqgtratesiheprinciples involved. F ur l s, mp p a -v wmi m ip mding v11r1a h 1,n .-n31111 tum adapted to emy myin gentian The'view-ljs partiallygdmlgmmmatic with many parts mmoved for lggg afir ls im liciliy andGABSLYII'XIBSS, the t pe of fm'gzc in fig fit'edfoli' lllus'tfaiqibnbeing that 'disclosam bDbfiughPatgntNm 4 7574 The work-holder and wheelunits may be operatively connected to mechanisms driven by the frictionwheel 24-or otherwise as desired, but the drive of the turn-table isdesirably independent of that of the wheel and work-holder units andsuch as to permit stopping rotation of the turn-tablewithoutinterrupting traverse grinding, Most-of'the mechanism shown in Figure'l'is described in detail in the McDonough patent referred into the holdersas they pass and that pref Work pieces are fed into the successivework-holders by any suitable loader 26that remains at one position,feeds the work pieces erably operates automatically. The pieces areunloaded after having been ground to size and having made almostcomplete circuit of the machine, by discharge mechanism 27 thatpreferably'operates automaticallyand is placed some little before theloader 26.

' f Both the loading and unloading mechanisms may be of any suitabletypes, as for distance 215 example suchyas are already described and Thework-holders are loaded with new pieces as they pass the loader 26,while the wheel units are suitably raised above the work-holders (Figure3a).

After a work-holder is loaded at 26, the wheel unit moves down'togrinding position and traverse grindin begins and continues with agradual feed iietween the work and wheel units until the piece is groundto size as determined by a miitable gauge or otherwise, irrelevant tothe present invention, the wheel units moving up out of the way when thepieces are ground to, size.

' Normally traverse grinding is completed and he g r idinglw els av mved upwardly u o (t e w iro a ng nd ad- ;ingl-bythe time the unitsreaclr a: designated i It :may ha pen that the grinding operation]- hasnot een completed by the timethe 0 unit reaches the designated point,"beyond which .it is deemed unsafe for traverse grinding-to continue, orthat the wheel un thas not yet risen by the time the designated point isreached so that it, is in the way ofnnloading and loading mechanisms,and my invention aims to stop the rotation of; the turn table inthisevent; preferably without interfari g w th he perati n f thegrinding mou ted .on the u n-ta l and wi h automatioresumption of therotation of the j tu ntable Whom the! g nding i at the: des- -i atedsoint s mple -ltsgrinding n wheel limit lei r ni o i th w r 1 1'. theillustration 1 I have monnted a 1 d 28 upon eachwheelrunit imposition toengage an arm 29 of the shift mechanism when the unit reaches thedesignated point in order to stop the rotation of the turn-table, withor without stoppage of the operation of the grindmg units, if the wheelunit is then still 1n posltlon for traverse grinding.

The rod 28 is mounted to vertically slide nsiipporting bearings, 30andBl at the ends of arms from the spindle of the grinding Wheel and maybe spring-pressed downward 1y at 32 so as to, maintain continual contactat 33 with the top of the work piece or with the u per end of the chuck,as long as the wheel unit is in position for traverse grinding, thewheel unit traversing up and down and therod remaining verticallystationary, supported by the top of the work piece or top oft'hework-holder in a position to engage the's'liift mechanism. i i

Optionally the spring 32 may be omitted, the weight of the rod holdingit down upon the'top of the work piece while the wheel and the bearingsof the rod move up and down.

The rod engages theshift lever and stops the rotation of the turn-tableonly when the wheel unit is in its low position, that for traversegrinding and normally the wheel unit when it reaches the designatedpoint is raised suflicient to clear the shift lever, as illustrated inFigure 3a, the rod then missing the shift lever and not affecting therotation of the turn-table.

The shift lever is an arm from a rocker shaft 34 journaled in bearings35and '36 and carrying at its lower end an arm 37 adapted to position thedriving belt 19 upon either glge drive pulley 20 or an adjacent idlerpulley The arm 37 is connected by link 39 to 'a belt slide 40mounted'slidab-lyupon a guide rod 41, and a spring 42 stretched betweenthe end of the'arm 37 and the supporting structure of the machine,automatically returns the shift mechanism to itsposition for operatingthe machine when the vertical rod 28 moves up and releases the armi29 ofthe shift mechanism. i

In operation the belt isshifted by engagement between the rod on thewheel unit and the arm 29 of the shift mechanism to stop rotation of theturn-table whenever a unit reaches the designatedpoint before itstraverse grinding has ceased, and unless the wheel unit has moved upinto its'raised pos ition. Preferably in this event traverse grindingcontinues after the turn-table stops until the work, piece comes to sizeafter ,which the wheel unit rises, which perniits the shift lever tospring backand start the turntable.

It will be evident that the-rod 28' performs an exploring function,since deteiniines whether or not the dingwheel is incentact withthework.

11 some of the "mamas 8 I have referred to means of this character asexploring means.

In view of my invention and disclosure variations and modifications tomeet individual whim or particular need will doubtless become evident toothers skilled in the art, to obtain all or part of the benefits of myinvention without copying the structure shown, and I, therefore, claimall such in so far as they fall within the reasonable spirit and scopeof my invention.

Having thus described my invention, what I claim as new and desire tosecure by Letters Patent is 1. A multiple internal grinding machinehaving duplicate grinding units mounted at spaced intervals around aturn-table, each unit comprising a work-holden'a grinding wheel, drivingmeans for the same, and means for ap lying the wheel to or removin itfrom t e work, and in which the grin ing operation is completed at eachunit durin a slngle rotation of the table, work-pieces ing'loaded intothe units as they pass a loading position and ground to size before theyreach an unloading position, in combination with a mechanical shut downfor the turntable to disconnect power driving application to theturn-table operative whenever a grinding unit reaches any designatedangular turn-table position on the machine while the grinding wheel ofthat unit is applied to the work.

2. In a multiple grinding machine, a turntable, duplicate grindingunits, each comprising a rinding wheel, means for applymg the w eel toor removing it from the work, and a. work-holder, mounted at spacedintervals therearound and adapted to com 40 plete the grinding o orationat each unit while the unit is ma 'n a single rotation of theturn-table, in com ination with a device adapted to stop the rotation ofthe turntable as each unit reaches a designated point of the machine ifthe grinding wheel and work-holder parts of the grinding unit arerelatively positioned for traverse grinding and to avoid stoppage of theturn-table if the grinding wheel is raised out of grinding position whenthe unit reaches said designated position.

3. In a multiple grinding machine, a turntable, duplicate grindingunits, each comprising a grinding wheel, means for applying the wheel toor removing it from the work, and a work-holder, mounted at spacedintervals therearound and adapted to complete the grinding operation ateach unit while the unit is making a single rotation of the turntable,in combination with a device for automatically stopping the movement ofthe turntable as each unit reaches a designated point, and means fordisconnecting the device for automatically stopping the turn-table by adeterminative movement of the grinding unitcharaeteristie of removalofthe grindingwheel from the work; I r, a 1 l a 4. In a multiplegrinding machine,- a turntable, duplicate grinding units "eachcomprisinga rinding wheel, means tor applying the wheehto or removingit from thework, and a work-holde1-,- mounted at spaced intervals therearound andadapted to complete the grinding operation at each unit while the unitis makin a single rotation of the turn-table, in com ination with shiftmechanism adapted to stop the rotary movement of the turn-table, an armmounted on each grinding unit adapted to engage and operate themechanism when the unit reaches a desig-" nated point of the machine ifthe grinding wheel and work-holder parts of the unit are stillrelatively positioned for grinding and to miss the mechanism if theparts of the unit are relatively positioned for unloading the unit.

5. In a multiple grinding machine, a plurality of grinding units eachconsisting of a grinding wheel, a bearing support thereof,

ing support, a work-holder, and means for moving the bearin support in adirection axial of the wheel or applying the wheel to means or drivingthe wheel within its bearor removing it from contact with the work inthe work-holder, means for progressing the grinding units alon a path,means for starting and stopping t e progression, and exploring meansresponsive to the vertical position of the bearing support at a definiteposition of the wheel adapted to stop the progression of the grindingunits during delay 1n completion of a piece of work.

6. In a rotary grindin machine, a turntable, a stop lever contro lingthe operation of the turn-table and having a normal retracted positionpermittin rotation of the table, and a pluralit o grinding units mountedon the table ollowing one another around a common orbit and eachconsisting of a wheel, a work-holder and a wheel support having a raisedposition and a low position res ectively for grinding and nongrinding ythe wheel in combination with abutments on the individual supports eachadapted to operatively engage or miss the stop lever at a definite ointof the orbit of its unit, according as t e support is then in its raisedosition or in its low position.

7. In a mu tiple grinding machine, a plurality of grinding units eachconsisting of a grinding wheel, a bearlng support thereof, means fordriving the wheel withln its hearing support, a work-holder, and meansfor moving the bearin support in a direction axial of the wheel orapplying the wheel to or removin it from contact with the work in thewor -holder, means for rogressing the grinding units along a path, evermeans for starting and stoppm the pro ression,

and a bar moving vertica 1y with t e bear-' the grinding units if thethen in grindingcposition.

grinding Wheel be LIFFORD T. RAULE.

CERTIFICATE OF CORRECTION.

Patent No. 1,871,468. August 16, 1932,

CLIFFORD T. RAULE.

It is hereby certified that error appears in the printed specificationof the above numbered patent requiring correction as fellows: Page 1,lines 84 and 85, strike out the Words "in vertical heights; and line 96,for the misspelled word "mehanlsm" read "mechanism"; and that the saidLetters Patent should be read with these corrections therein that thesame may conform to the record of the case in the Patent Office.

Signed and sealed this 14th day of February, A. l). 1933.

Moor

(Seal) Acting llon'i r'uissloii r of Patents.

the grinding units if the then in grindingcposition.

grinding Wheel be LIFFORD T. RAULE.

CERTIFICATE OF CORRECTION.

Patent No. 1,871,468. August 16, 1932,

CLIFFORD T. RAULE.

It is hereby certified that error appears in the printed specificationof the above numbered patent requiring correction as fellows: Page 1,lines 84 and 85, strike out the Words "in vertical heights; and line 96,for the misspelled word "mehanlsm" read "mechanism"; and that the saidLetters Patent should be read with these corrections therein that thesame may conform to the record of the case in the Patent Office.

Signed and sealed this 14th day of February, A. l). 1933.

Moor

(Seal) Acting llon'i r'uissloii r of Patents.

